Yveltal @ Leftovers  
Ability: Dark Aura  
EVs: 252 HP / 176 Def / 80 Spe  
Impish Nature  
- Oblivion Wing  
- Foul Play  
- Taunt  
- Sucker Punch  

Rayquaza @ Choice Specs  
Ability: Air Lock  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Surf  
- Draco Meteor  
- Ice Beam  
- Fire Blast  

Pheromosa @ Expert Belt  
Ability: Beast Boost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- High Jump Kick  
- Poison Jab  
- Outrage  
- Drill Run  

Toxapex @ Black Sludge  
Ability: Regenerator  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Scald  
- Haze  
- Toxic Spikes  
- Recover  

Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
Happiness: 0  
EVs: 248 HP / 8 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psychic  
- Disable  
- Protect  
- Recover  

Arceus-Water @ Splash Plate  
Ability: Multitype  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Defog  
- Thunder Wave  
- Recover  
- Judgment